On the reproductive biology of the talitrid amphipod Platorchestia monodi (Mateus et al.,1986) from the Shatt Al-Arab region, Basrah, Iraq

The life history and breeding activity of the supralittoral amphipod, Platorchestia monodi (Mateus et al. 1986) were studied. amphipods sampled from Garmat-Ali region, Basrah, over period 26th August 1993-28th January 1995. Random samples taken on a monthly basis. mostly abundant under drifted aquatic plants (wrack), which providing food shelter.Sexual maturity occurred in males at size 5.25 mm 5.0 females. Ovigerous females found throughout year. Mean egg (0.75 mm) was increasing during embryonic development. brood ranging 5-18 ova, fecundity an exponential function female. There preponderance (1.9:1) population. population polymodal entire sampling period. span 11-14 months, whereas that 15 months.